Wrench



July 2 1929. I r DE ANDERSON 1,719,414

WRENCH Filed April 22, 1927 IN VENTOP LOANDEPSON Patented dilly 2, 1929.

inrrt lJi'llltdl l LON DE MOSS ANDERSON, OF GROSS CUT, TEXAS.

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Application filed April 22,

My invention relates to wrenches, and more particularly to the improved adjustable plier type of wrenches.

The principal object of any invent-ion is to provide a wrench of the adjustable end opening plier type in which the transverse dimensions relative to the longitudinal axis of said wrench are reduced to the same extent that thc' adjustable jaw is moved toward the opposed jaw.

.Other objects of my invention are :-to provide awrench with one slidable adjustable jaw opposed to a jaw that moves on a pivot.

To provide a. wrench in which the jaws open at an angle relative to each other rather than parallel.

To provide a wrench with a slidable adjustable jaw with a curved shank slidably connecting it to other part of wrench, in which said sliding shanlr changes its direction of motion from a transverse to a longitudinal relative to handles of the wrench.

To provide a wrench in which the jaws grip the object to be held or turned.

To provide a wrench in which the adj usting mechanism conveniently located thereon to be operated by the fingers when thewrench is held in the hand in the normal position for operation.

To provide a wrench in which the jaws are set at a suitable angle, preferably at forty live degrees, relative to the handles.

To provide a wrench in which the jaws are provided with suitable notches for engaging the corners of nuts or polygon shaped objects, walls of said notches being corrugated for holding round objects.

To provide a wrench of the adjustable end opening plier type that is simple, strong and cheap to manufacture.

lVith these and other objects in view my invention consists in .the novel features of construction, combination and arrangement described and illustrated in the accompanying drawing in which Fig. 1, is a side elevation of my improved wrench.

Fig. 2 is a modified form of my invention wherein the adjusting mechanism consists of a screw engaging rack teeth in a guide pivoted to curved shank of adjustable jaw.

Referring in detail to Fig. 1, the numerals 1 and 2 refer to the handles pivoted at 4c, the handle 2 extends beyond the pivot elend the jaw 5 is termed thereon, the handle is I i L,

i ll 1927. Serial No. 185,817.

1 is so constructed as to form a loop or sleeve 13 near the pivots: which acts as a guide for the curved shank 3 on which the jaw 6 is formed. There is also liormed upon the handle 1 another guide 7, in which teeth are provided as shown to engage the teeth 1%) formed on the shank 3. i

The spring 9 attached at the point 1% er;- tends through the sleeve 13 and pres-40s downward on the shank 3 at point 10 pressing the shank 3 firmly down upon the point 11.

The opening in the sleeve 13 is enlarged at 23 to allow the shank 3 to swing on the point 11 as a pivot as it is slid through the sleeve 13; the swinging movement provided shank 3 by the curvature of the are 251;, formed on shank 3, as it passes through the guide 7. i

N ow since the spring 9 presses down on the shank?) at 10 and since the point 10 is nearer the jaw 6 than the point 11 the jaw end of the shank 3 will be normally pushed downward, and the end with the teeth pushed upward and outward thereby engaging the teeth 19 with similar opposed teeth within the guide 7.

Now since the shank 3 swings on the point- 11 as a pivot the shank 3 can be constructed on a true curve or a compound curve to give the jaw 6 the desired angle A 13 relative to the opposed jaw 5, when opened.

In this particular drawing, the shank 3 is constructed on a true curve with the point 12 as a center so that the jaw 6 opens from the jaw 5 as if pivoted at the point 12 cansing the angle A C B to be more acute than would be if both jaws were pivoted at the same point at or near the point 4;, yet the wrench has the same gripping power as if pivoted at 4.

The jaw 5 opening on 4 as a pivot would form an angle too obtuse for handling nuts or gripping other objects it open to any great extent, but since all major adjustments are made with the jaw 6 it is never necessary to open the jaw 5 but slightly, for minor adjustments.

In the faces of the jaws and near their points are notches 21 which may be corrugated as at 22, these notches are desirable in this form of wrench in which the jaws open at an angle, and are especially adapted for engaging the corners of the nuts and since they are corrugated they are suitable for turning or gripping round objects as pipe,

Fig. 2, is a modified form of my invention in which the adjusting mechanism consists of a screw and a rack member 18 with teeth engaging the screw mounted on the handle 1, screw being heldin place by the pin 32.

The member 18 has at either end the guides 16 passing around the handle 1, the rack member 18 being hinged to the curved shank 3 by the pin or rivet 20, the portion of the handle from 20 to 28 is set at a suitable angle relative to the sleeve 13 to give the jaw 6 whatever motion desired as in this form of the wrench the angle at which the jaw 6 .opens depends on the curvature of the curved shank 3-3 together with the angle at which the section of the handle 1 from 20 to 28 is set relative to'the sleeve 13.

The Fig. 1, shows in particular how the width of thewrench at the jaws is lessened when the jaws are closed there being no wide head left to be in the way when operating the wrench on small objects.

In Fig. 1, the full lines show the jaws closed and the dotted lines show them open to their greatest extent the difference of the distance 29.29 and 2929 is the amount the wrenchnarrows when the jaws close, the

I so

- vided with a jaw, guides mounted upon the other of said handles, a curved shank slidably held by said guides, teeth in one of said guides, and teeth upon said curved shank for detachable engagement with the teeth upon one of said guides, a jaw integrally formed on the said curved shank, opposed to the said jaw on the said handle.

2. In a wrench the combination of a pair of pivoted handles, one of said handles provided with a jaw, a co-operating jaw integrally formed on a curved shank having teeth thereon and slidably attached to the other of said handles, a guide upon the second handle and a spring normally holding the teeth on said curved shank in engagement with opposed teeth in the guide.

3. A wrench having in combination a pair of pivoted handles, there being a jaw fixed upon one of said handles at an angle of about forty-five degrees to the longitudinal axis of the wrench, guides upon the second of said handles, a co-operating adjustable jaw on the second of said handles, there being a curved shank for said adjustable jaw sliding through said guides upon the second of said handles in such manner that the faces of the jaws approach each other as radii of a circle whose center is the center of curvature of the curved shank.

41-. In a wrench, the combination of a pair of pivoted handles, there being a fixed jaw upon one of said handles, two guides upon the second of said handles, an adjustable opposed jaw slidably attached to the second of said handles by means of a curved shank integrally formed on opposed adjustable jaw; the said curved shank operating slidably and pivotally through one of the said guides and slidably through the other of said guides, whereby said opposed adjustable jaw may be made to approach said fixed jaw in any manner desired, according to the character of curvature of said curved shank and the position of the guides.

In testimony whereof I have hereto affixed my signature.

LON DE MOSS ANDERSON. 

